Blemmyae:
Various species of mythical 
headless men were rumoured, in antiquity and later, to inhabit remote parts of the world. They are variously known as 
akephaloi (Greek ἀκέφαλοι, "headless ones") or
 Blemmyes (Latin: 
Blemmyae; Greek: βλέμμυες) and described as lacking a head, with their facial features on their chest. These were at first described as inhabitants of ancient Libya or the Nile system (Aethiopia). Later traditions confined their habitat to a particular island in the Brison(e) River, or shifted it to India.
Source — includes a discussion of the unsettled etymology of the name "Blemmyes".